作业帮去括号、合并同类项去括号5c²-（a²-b²-ab）-m+（-n+p-q)xy-(-2x²-y²+z²）-（2x-y)+(z-1)先去括号,再合并同类项5a+(2a-4b)2x²-3（2x²-x²）去括号5x²-[3x-2(2x-3)-4x²]
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/28 18:14:32
![去括号、合并同类项去括号5c²-（a²-b²-ab）-m+（-n+p-q)xy-(-2x²-y²+z²）-（2x-y)+(z-1)先去括号,再合并同类项5a+(2a-4b)2x²-3（2x²-x²）去括号5x²-[3x-2(2x-3)-4x²]](/uploads/image/z/2008062-54-2.jpg?t=%E5%8E%BB%E6%8B%AC%E5%8F%B7%E3%80%81%E5%90%88%E5%B9%B6%E5%90%8C%E7%B1%BB%E9%A1%B9%E5%8E%BB%E6%8B%AC%E5%8F%B75c%26%23178%3B-%EF%BC%88a%26%23178%3B-b%26%23178%3B-ab%EF%BC%89-m%2B%EF%BC%88-n%2Bp-q%29xy-%28-2x%26%23178%3B-y%26%23178%3B%2Bz%26%23178%3B%EF%BC%89-%EF%BC%882x-y%29%2B%28z-1%29%E5%85%88%E5%8E%BB%E6%8B%AC%E5%8F%B7%2C%E5%86%8D%E5%90%88%E5%B9%B6%E5%90%8C%E7%B1%BB%E9%A1%B95a%2B%282a-4b%292x%26%23178%3B-3%EF%BC%882x%26%23178%3B-x%26%23178%3B%EF%BC%89%E5%8E%BB%E6%8B%AC%E5%8F%B75x%26%23178%3B-%5B3x-2%282x-3%29-4x%26%23178%3B%5D)
去括号、合并同类项去括号5c²-（a²-b²-ab）-m+（-n+p-q)xy-(-2x²-y²+z²）-（2x-y)+(z-1)先去括号,再合并同类项5a+(2a-4b)2x²-3（2x²-x²）去括号5x²-[3x-2(2x-3)-4x²]
去括号、合并同类项
去括号
5c²-（a²-b²-ab）
-m+（-n+p-q)
xy-(-2x²-y²+z²）
-（2x-y)+(z-1)
先去括号,再合并同类项
5a+(2a-4b)
2x²-3（2x²-x²）
去括号
5x²-[3x-2(2x-3)-4x²]
去括号、合并同类项去括号5c²-（a²-b²-ab）-m+（-n+p-q)xy-(-2x²-y²+z²）-（2x-y)+(z-1)先去括号,再合并同类项5a+(2a-4b)2x²-3（2x²-x²）去括号5x²-[3x-2(2x-3)-4x²]
去括号
5c²-（a²-b²-ab）=5c²-a²+b²+ab
-m+（-n+p-q)=-m-n+p-q
xy-(-2x²-y²+z²）=xy+2x²+y²-z²
-（2x-y)+(z-1)=-2x+y+z-1
先去括号,再合并同类项
5a+(2a-4b)=5a+2a-4b=7a-4b
2x²-3（2x²-x²）=2x²-6x²+3x²=-x²
去括号
5x²-[3x-2(2x-3)-4x²]=5x²-[3x-2(2x-3)-4x²]
=5x²-[3x-4x+6-4x²]
=5x²-[-x+6-4x²]
=9x²+x-6
5c²-a²-b²+ab -m-n+p-q xy+2x²+y²-z² -2x+y+z-1 5a+2a-4b=7a-4b 2x²-6x²+3x²=-x² 5x²-(3x-4x+6-4x²)=5x²+x-6+4x²=9x²+x-6